Mill for granulating corn, corncobs, &amp;c.



No. 669,048. Patented Feb. 26, I90l.

C. R. SPENCER.

MILL FDR GRANULATING CORN, CORNCOBS. &c.

(Aplllinnfinn filed Sept. 6, 1900.=

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. Th *rarns PATENT OFFICE.

CHARLES R. SPENCER, OF BALTIMORE, MARYLAND, ASSIGNOR TO IVILLIAM D.COLT, OF WASHINGTON, DISTRICT OF COLUMBIA.

lVllLl. FOR GRANULATING CORN, CORNCOBS, 86C- SPEOIFIGATION forming partof Letters Patent No. 669,048, dated February 26, 1901.

Application filed September 6, 1900. Serial No. 29,123. (No model.)

To aZZ whmn it may concern:

Be it known that 1, CHARLES R. SPENCER, of the city of Baltimore, in theState of Maryland, have invented certain Improvements in Mills forGranulating Corn, Corncobs, Fodder, &c., of which the following is aspecification.

This invention relates to certain improvements in a granulating-mill forreducing corn,

1o cobs, hnsks, feathers, and a variety of other materials to apractically uniform size, as will hereinafter fully appear.

In the description of the improved mill which follows reference is madeto the accompanying drawings, forming a part hereof, in

which- Figure 1 is a half-sectional end view of the improved granulating-mill. Fig. 2 is a partlysectional side view of certain parts ofthe same. Fig. 3 is a half-sectional plan or top view of Fig. 1. Figs.4, 5, 6, and 7 are detached views of parts of the mill hereinafterdescribed.

Referring now to the drawings, 1 represents the frame of the mill, and 2the legs of the same, which are shown as broken off.

3 and 4 are gran Mating-cylinders situated side by side and secured,respectively, to the shafts 5 and 0'. These shafts are supported 0 insuit-ablelaterally-adj ustable bearing-boxes 7 and b, erected on theframe 1. The shafts 5 and 6 are connected by the meshed gearwheels 9 and10, and the shaft 6 is provided with a driving-pulley ll.

5 By reference to Fig. 3 of the drawings it will be seen that thegear-wheel 9 is of a greater diameter than the one 10. Consequently inthe operation of the mill the cylinder a will be rotated at a greaterspeed than the one 3.

In Fig. 1 the gear-wheel 9 is represented by a few teeth and a dottedcircle and the one 10 by a dotted circle only.

The cylinders 3 and a consist each of a head 12, of polygonal shape whenseen from either end thereof and whose sides have grooves 13, extendingtheir entire length, and the plates 14, having tongues 15, which fit inthe grooves 13. (See Figs. 1 and 5, the latter being an end view of oneof the said plates.) The said plates are segmental in shape, and theirlongitudinal edges abut, so as to effect a continuous cylindricalcovering for the heads 12,

as seen in Fig. l. The plates 14 are held in position by the tapbolts16, inserted through the flange of the heads from the inside. Thecylinders, formed as described, are circumferentially grooved,thegrooves 17 being separated by projections of preferably the same width.Thesecircularprojectionsaregrooved 6o diagonally and longitudinally ofthe plates to form teeth 18, some of which are seen in Figs.

1, 4, and 5. It will be understood that the cylinders rotate in oppositedirections, their movement, as seen from the top of the mill, beingtoward each other, and they are sufficiently separated to admit of theinsertion between them of the comb l9. (Shown in Figs. 6 and 7, theformer being a top view ofa part of the comb and the latter across-section of it.)

The lateral edges of the comb 19 are notched, (see Fig. 6,) and thewidth of the notches corresponds to that of the teeth of the cylinders,which teeth in the operation of the mill pass through them.

By reference to Figs. 1, 6, and 7 it will be seen that the comb 19 isprovided with two stems 20, held thereto by the nuts 21, and A thatthese stems pass down through the guid- 8o iug'bar 22 and the frame 1and have lateral projections which rest on the cams or eccentrics 23.(See particularly Fig. 2.) These eccentrics are fastened to ashaft 24.,supported in bearings formed as a part of the frame 8; 1, and theeccentric-shaft at one end is furnished with a handle 25, whereby theshaft and the eccentrics may be given a half-rotation for a purposehereinafter described.

26 is a curved bar secured to the frame 1, having holes 27, into any oneof which a pin 28 may be inserted through a corresponding hole 29 in thehandle to hold the cams or eccentrics in a desired position and the combat a desired height. In Fig. l the comb is 5 shown as in its centralposition, or that which is half-way between its highest and lowestpoints.

30 is a hopper to receive the materials to be granulated. It is situatedover the two cyl- 10o inders 3 and 4 and provided with flanges 31, towhich the two sections of a casing 32 are secured.

33 is a rotary agitator within the hopper 30. This device is driven inany appropriate manner, and while it may be an advantage the mill ingranulation certain materials it is not deemed essential and forms nopart of the present invention.

Materials thrown into the hopper are caught by the teeth of thecylinders,which,in con nection with the comb, reduce them to a uniformsize, and the granulated substance falls below the frame.

In gran ulating comparatively heavy bodies, such as corn and corncobs,the comb is ele vated somewhat above the horizontal center line of thecylinders, the weight of the materials serving to keep them in propercontact with the toothed cylinders; but with lighter material, such asfodder and feathers, the comb is lowered to below the said central line,when the teeth of the cylinders have a tendency to draw in the materialstoward themselves.

The cam arrangement, whereby the comb may be elevated above or broughtbelow the horizontal center line of the cylinders, admits of theadjustment of the comb to suit a great variety of substances differingin weight and other peculiarities, thus increasing the generalusefulness of the mill.

By rotating the granulating-cylinders at different speeds the packing ofthe materials in the lower portion of the hopper and in contact with thesaid cylinders is effectually prevented.

I claim as my invention 1. In a granulating-mill, the combination of twocylinders of uniform diameter with peripheral teeth of a common size andshape, means to rotate the said cylinders in opposite directions and atdiiferent speeds, a horizontally-placed comb situated between the saidcylinders having notches which are of the same size as the teeth of thecylinders, and means to vertically adjust the said comb, substantiallyas, and for the purpose specified.

2. In a granulating-mill, the combination of two granulating-cylinderswith means to drive them in opposite directions, vertical stems situatedbetween the granulating-cylinders, cams or eccentrics placed below thestems whereby the same may be adjusted in height, and a granulating-combsecured to the upper ends of the said stems having notches through whichthe teeth of the granulating-cylinders pass in the operation of themill, substantially as, and for the purpose specified.

' CHARLES R. SPENCER.

Witnesses:

OREGON MILTON DENNIS, WM. T. HOWARD.

